### Bug report

When the loaderType is set to "skeleton" and the grid is a hierarchy, the skeleton placeholder for the last column is not rendered.

### Reproduction of the problem

1. Set the loaderType to "skeleton".

2. Set a child grid to create a hierarchy.

3. Load the grid.

4. The last column has no skeleton container.

### TicketID: 1534057

### Environment

* **Kendo UI version:** 2021.2.616
* **jQuery version:** 1.12.4
* **Browser:** [all]